Remove customisation support for `SongProgressDisplay`
Remove customisation support for `SongProgressDisplay`

peppy/osu-new,smoogipoo/osu,smoogipooo/osu,NeoAdonis/osu,UselessToucan/osu,UselessToucan/osu,peppy/osu,NeoAdonis/osu,smoogipoo/osu,ppy/osu,ppy/osu,peppy/osu,peppy/osu,ppy/osu,NeoAdonis/osu,smoogipoo/osu,UselessToucan/osu